- Powell, Richard L.4
- Tharp, W. E. (William Edgar)4
- Baldwin, Mark (Soil surveyor)3
- Barrett, Wendell3
- Dempsey, W. J.3
- Dinsmore, A. F.3
- Duffner, R. T.3
- Hefel, Toney C., cartographer.3
- Hole, Allen David, 1866-19403
- Klooz, C. J.3
- Mitchell, S. Augustus (Samuel Augustus), 1792-18683
- Newsom, John F. (John Flesher), 1869-19283
- Palmer, Thos. W. (Thomas W.)3
- Ulrich, H. P. (Herbert Paul), 1904-cartographer.3
- White, Frank W., C.E.3
- Ault, Curtis H.2
- Ball, T. H. (Timothy Horton), 1826-19132
- Bridgman, E. C.2
- Burke, R. T. Avon (Richard Thomas Avon), 1878-cartographer.2
- Colton, J. H. (Joseph Hutchins), 1800-18932